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The anterior thoracic nerve from the C5 to C8 roots innervates the pectoralis major and minor, and the thoracodorsal nerve from C6 to C8 roots innervates the latissimus dorsi muscle. The axillary nerve is formed by fibers of the C5 to C6 roots which go through the posterior cord of the plexus and innervate the deltoid and teres minor muscles, as well as part of the skin of the lateral shoulder.
Overview. Motor: Innervates a number of the extraocular muscles. Parasympathetic: Supplies the sphincter pupillae and the ciliary muscles of the eye. Sympathetic: No direct function, but sympathetic fibres run with the oculomotor nerve to innervate the superior tarsal muscle.natomical Course. The oculomotor nerve originates from the anterior aspect of the midbrain. It moves anteriorly, passing below the posterior cerebral artery, and above the superior cerebellar artery. The nerve pierces the dura mater and enters the lateral aspect of the cavernous sinus.